A 10 m thick sand layer is underlain by 8 m thick clay layer. The groundwater is found to be at 3 m below the surface at the present time. In the Past (long time ago) the ground water table was at 6 m below the ground surface. The sand unit weight, ymoist=18 kN/m³ and the clay saturated density yat = 17 kN/m³. Required: A) Total stress, pore pressure and effective stress at points A, B and C in Both Cases? B) Calculate the over consolidation ratio (OCR) at the midpoint of the clay layer?
A 10 m thick sand layer is underlain by 8 m thick clay layer. The groundwater is found to be at 3 m below the surface at the present time. In the Past (long time ago) the ground water table was at 6 m below the ground surface. The sand unit weight, ymoist=18 kN/m³ and the clay saturated density yat = 17 kN/m³. Required: A) Total stress, pore pressure and effective stress at points A, B and C in Both Cases? B) Calculate the over consolidation ratio (OCR) at the midpoint of the clay layer?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A 10 m thick sand layer is underlain by 8 m thick clay layer. The groundwater is found to be at 3 m below
the surface at the present time. In the Past (long time ago) the ground water table was at 6 m below the
ground surface. The sand unit weight, ymoist=18 kN/m³ and the clay saturated density y«at = 17 kN/m³.
Required:
A) Total stress, pore pressure and effective stress at points A, B and C in Both Cases?
B) Calculate the over consolidation ratio (OCR) at the midpoint of the clay layer?
A
Present groundwater level
Sand
Y= 18 kN/m3
10m
3m
Current
B
Case
4m
A
Clay
y= 17 kN/m3
C
4m
A
Sand
Past groundwater level
Tem
10m
Y= 18 KN/m3
Previous
B
Case
4 m
A
Clay
y= 17KN/m
C
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